What's the difference in hp?
Front end is different?
What is meant by door sills? And what's different in the door sills?
Suspension in coupe version is the same as a regular G37X coupe?

 

Front dampers are different to clear the axles. Larger front sway bar and smaller rear sway bar to ensure understeer. Other detail changes. Rear is the same for all G37 models except sway bar, and damping and spring rates. Differences are small.

Don't think there's an hp difference except for IPL.

Coupe and sedan have virtually no body parts that interchange.

 

so minimal difference in dampininmg?
so the main diff between 2011 g37x coupe and g7xs coupe is ;
rims
seats
spoiler
and door sills .
not even from bumper ?

 

I don't know suspension differences between x and xS

I think xS coupes get the Akebono big brakes, though.

Door sill molding might be different, I don't know.

Spoilers are not part of the S package. I had to buy the spoiler on my sedan S.

 

Steering ratio? Or just S coupe and IPL? Xs get the tighter rack?